> he will not be treated as an enemy combatant. we will prosecute this terrorist through our civilian system of justice. under u.s. law, united states citizens cannot be tried in military commissions. >> historically speaking, foreign policy tends to either stain or illuminate a president's legacy. time will tell which foreign policy position will define the obama years. joining us to discuss from washington is former assistant secretary of state and professor at george washington university, professor pj crowley. professor, thank you for joining us. >> hello. >> pj as we talk about the legacy of the obama doctrine, vis-a-vis our war on terrorists drones. the attacks were motivated to do what they did by the wars in iraq and afghanistan. i'll quote a little bit from that story. the 19-year-old suspect in the boston marathon bombings has told interrogators that the american wars in iraq and afghanistan, motivated he and his brother to carry out the attack. what do you make of that, pj? >> i'm not surprised at all that has been a mot